• 제목/요약/키워드: change aspect

검색결과 1,191건 처리시간 0.025초

Size and Aspect Ratio Effects on the Magnetic Properties of a Spin-Valve Multilayer by Computer Simulation

  • Lim, S.H.;Han, S.H.;Shin, K.H.;Kim, H.J.
    • Journal of Magnetics
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    • 제5권3호
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    • pp.90-98
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    • 2000
  • The change in the magnetic properties of a spin-valve multilayer with the structure IrMn (9 m)/CoFe (4 nm)/Cu (2.6 nm)/CoFe (2 nm)/NiEe (6 nm) is investigated as a function of the size and the aspect ratio. At a fixed aspect ratio (the length/width ratio) of 2, the magnetostatic interactions begin to affect the magnetic properties substantially at a spin-valve length of 5 $\mum$, and, at a length of 1 $\mum$, they become even more dominant. In the case of a fixed multilayer size (2.4 $\mum$) which is indicated by the sum of the length and the width, magnetization change occurs by continuous spin-reversal and M-H loops are characterized by no or very small hysteresis at aspect ratios smaller than unity, At aspect ratios greater than unity, magnetization change occurs by spin-flip resulting in squared hysteresis loops. A very large changes in the coercivity and the bias field is observed, and these results are explained by two separate contributions to the total magnetostatic interactions: the coercivity by the self-demagnetizing field and the bias field by the interlayer magnetostatic interaction field.

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미래 기후변화에 따른 제주도의 사면과 해발고도별 가뭄 예측 (Prediction of Regional Drought considering Aspect and Elevation in Jeju Island under Future Climate Change)

  • 박종철;최광준;송성호
    • 한국환경과학회지
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    • 제23권4호
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    • pp.649-660
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    • 2014
  • Spatial and temporal patterns of precipitation and temperature occur with regard to aspect and elevation of Mt. Halla in Jeju Island. Therefore, there is a need to predict regional drought associate with them to mitigate of impacts of drought. In this study, regional drought is predicted based on Palmer drought severity index (PDSI) and standardized precipitation index (SPI) using future (2015~2044) climate change scenario RCP (representative concentration pathways) 4.5 classified as 24 regions according to aspect and elevation. The results show that number and duration of drought will be decrease in Jeju Island. However, severity of severe drought will be increase in western and northern aspect with under 200 meters above mean sea level. These findings provide primary information for developing the proactive strategies to mitigate impacts of drought by future climate change in Jeju Island.

한국 가계양식의 변천과정과 특성에 관한 연구 (A Study on the Process of Change and Characteristics of Korean Gagye Style)

  • 임린;김은정
    • 복식
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    • 제55권7호
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    • pp.142-155
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    • 2005
  • This study shows historical Gagye(가계) The process of change and Characteristics through analysis on the old documents, related papers, and visual data, and represents its meaning in Korean Clothing history through analysis on originality of Korean Gagye(가계) style. Gagye(가계) is the cubic hair style which add other accessories on hair and is divided into two; Gagye(가계) and Chegye(체계) according to its material, role, and function. And Korean Gagye(가계) has been transformed suited to the times and showed various features according to pattern, wearing, and decoration aspect. In its style aspect, Korean Gagye(가계) style shows Hwangye type, Sseugae type, Gogye type, Dagye type, and Braided & coiled hair type. Each shows historical features. In its Wearing aspect, Gagye(가계) style shows Wearing ornamental hairpin on the head, Wearing Rag Ribbon on the head, and Attaching (Detaching) Wearing. And in its Decoration aspect, Gagye(가계) style shows decoration with accessories, one with flower arrangement, and one with shaking.

보조동사 '-어 가-'와 상 (An Auxiliary Verb '-e ka-' and the Aspect)

  • 김천학
    • 한국어학
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    • 제62권
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    • pp.171-194
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    • 2014
  • In this paper, I seek to differentiate the meaning of the auxiliary verb '-e ka-' from imperfective aspect in Korean. The progressive in imperfective is expressed by the 'be+V-ing' in English and '-ko iss-' in Korean. However the '-e ka-' in Korean can express the gradual progress meaning. This is similar to the progressive of some state verbs. These verbs cannot express the progressive aspect but it is possible if they can express the change of state in sentence. It is more corresponding to the '-e ka-' than '-ko iss-' in Korean.

효율적인 서비스 시스템 개발을 위한 룰 기반의 관점 지향 기법 (Rule-based Aspect Oriented Approach for Efficient Service System Development)

  • 이우진;최일우
    • 한국산학기술학회논문지
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    • 제16권1호
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    • pp.735-743
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    • 2015
  • 서비스 지향 아키텍처(Service Oriented Architecture)는 엔터프라이즈 애플리케이션 개발 시 유연성을 보장하여, 비즈니스 변화에 최대한 민첩하게 대응하도록 지원한다. 그럼에도 불구하고 비즈니스와 제약조건을 하나의 서비스로 코딩하는 일반적 접근법은 비즈니스 룰의 변경을 위하여 전체 결합로직을 변경하는 등 많은 자원을 소모하게 된다. 본 논문에서는 이러한 문제점을 개선하기 위하여 서비스 시스템 개발에 관점 지향 기법(Aspect Oriented Approach)을 확장하여 적용한다. 관점 지향 기법의 기존 핵심관심(Core Concern), 횡단관심(Cross Cutting Concern)이외에 비즈니스 프로세스와 서비스에 포함된 비즈니스 룰을 룰관심(Rule Concern)이라는 새로운 관심사로 분리한다. 룰관심은 수준에 따라 프로세스 룰관심(PRA: Process Rule Aspect)과 서비스 룰관심(SRA: Service Rule Aspect)으로 구분된다. 시스템은 이러한 관심사의 분리를 통하여 핵심관심, 횡단관심 및 룰관심으로 각각 모듈화 되고 독립적으로 유지보수 되어 서비스 시스템의 적용성, 재사용성 및 유지보수성을 높일 수 있다.

'기귀정(氣歸精) 정귀화(精歸化)'에 대한 연구(硏究) (A Study on 'Ki goes to Essence and Essence goes to Change')

  • 송지청;엄동명
    • 대한한의학원전학회지
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    • 제27권3호
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    • pp.183-188
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    • 2014
  • Objectives : The Phrase, Ki goes to Essence and Essence goes to Change in Eumyangeungsangdaeron in Suwen have contradiction in direction of Ki. Because this phrase linked to relation of Taste, Shape, Ki, Essence and Change, each others are supposed to be treated systematically. Methods : We will review on annotations of past doctors and new opinions of resent scholars. Results : Ki has two meanings in this phrase ; Ki of food and Ki of ability in human nature. Conclusions : From the Taste through Shape to Ki of food are the way of Eum aspect and from the Ki of ability through Essence to Change are the way of Yang aspect.

철도차량 설계대안 선정에 대한 GHG 배출량 기반 환경 경제성 통합평가 사례연구 (A Case Study of Integration Assessment of Environmental Aspect and Cost Aspect Based on GHG Emission for Design Alternative Selection of a Railway Vehicle)

  • 최요한;이철규;이재영;김용기;정우성
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2011년도 춘계학술대회 논문집
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    • pp.606-612
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    • 2011
  • At the product design and development stage, the main criteria selecting a design alternative were performance aspect as well as cost aspect of a product. Ongoing new paradigm shifts such as low carbon green growth, climate change mitigation, sustainable society development urged considering environmental aspect of a product at the product design and development stage. Up to recently, only cost aspect except performance of a product was considered at the railway vehicle design process. Therefore, it is needed to develop a method that may consider environmental aspect of a product at the railway vehicle design process. Lee (2011) proposed that a method of an integration assessment of environmental aspect and cost aspect based on GHG emission instead of based on monetary value. This study conducted that apply the method of Lee (2011) to design alternative selection process of a railway vehicle. From the integrated view of environmental and cost aspect, the reference product and design alternatives are assessed and compared.

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The Effects of Drought on Forest and Forecast of Drought by Climate Change in Gangwon Region

  • Chae, Hee-Mun;Lee, Sang-Sin;Um, Gi-Jeung
    • Journal of Forest and Environmental Science
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    • 제28권2호
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    • pp.97-105
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    • 2012
  • A Gangwon region consisting of over 80% of forest area has industries that have been developed by utilizing its clean region image. However, the recent climate change has increased the forest disease & insect pest as well as the forest fire and the major cause is known to be the increase in the frequency of a drought occurrence. From the aspect of climate change, it can be said that drought and forest are important in every aspect of the adaptation and mitigation of climate change measure as they increase forest disease & insect pest that leads to desolation of usable forest resource. In addition, the increase of forest fire reduces resources that can absorb greenhouse gas, which leads to increase in green house emission. The purpose of this study is to provide a motive for concentrating administrative power for protecting forest in a Gangwon region by selecting a drought management needed local government through a drought forecast according to the climate change scenario of a Gangwon region.

Vaned Wheel Atomizer에 의한 CWM 미립화 (Vaned Wheel Atomization of CWM)

  • 김성준;김용선
    • 대한기계학회논문집
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    • 제16권5호
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    • pp.974-982
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    • 1992
  • 본 연구에서는 Wheel 미립화기로 CWM을 분사시켰을때 Vane의 형태가 혼합연료 방울의 크기분포에 미치는 영향을 실험적으로 연구하는 것이며 그 연구 내용을 요약하 면 다음과 같다. .Vane의 형상계수(Aspect ratio)가 연료방울의 크기분포에 미치는 영향 .Vane의 각도가 연료방울의 크기분포에 미치는 영향 .미분탄 부하도와 연료방울의 SMD변화 .미분탄 분포의 평균크기변경에 따른 연료방울의 SMD변화 위에서 형상계수라함은 Vane의 출구직경(d)와 Vane의 출구길이 (L)의 비(L/d)를 의미 하고 있다.

셀의 형상비에 따른 미세기공 재료의 유한요소해석 (Finite Element Analysis of Cellular Material According to Aspect Ratio of Cell)

  • 윤성원;이정우;강충길
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2002년도 춘계학술대회 논문집
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    • pp.890-893
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    • 2002
  • This study is focused to predict the behavior of Al foam with closed-cell structure during the 3 point bending test and the upsetting test according to aspect ratio. We calculated characters of aluminum foams with closed-cell structure and took the simulation. The effects on the aspect ratio of the cell was investigated parametrically. The analysis was carried out on two models, First, the bending test in elasticity of the rectangular beam, and Second, the upsetting test in plasticity of the circular cylinder. In the analysis, the deformation of the beam and the cylinder was influenced by the aspect ratio of the cell. Further, We assumed that the geometry of feared aluminum cell change the stress and strain in the test.

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